.selector {
  margin-top: .15rem;

  h2 {
    font-size: .16rem;
    padding: .1rem 0;
  }

  button,
  input {
    width: .2rem;
    height: .2rem;
    background-color: #fff;
    border: .01rem solid #999;

    font-size: .13rem;
    box-sizing: border-box;
  }

  button {
    border-radius: 50%;
  }

  input {
    text-align: center;
    margin: 0 .05rem;
  }
}